package com.yypinger.utils;

public class GaussXYDeal {
	
	// 由高斯投影坐标反算成经纬度
	public static double[] GaussToBL(double X, double Y)//, double *longitude, double *latitude)

	{
	  int ProjNo; int ZoneWide; ////带宽
	  double[] output = new double[2];
	  double longitude1,latitude1, longitude0, X0,Y0, xval,yval;//latitude0,
	  double e1,e2,f,a, ee, NN, T,C, M, D,R,u,fai, iPI;
	  iPI = 0.0174532925199433; ////3.1415926535898/180.0;
	  //a = 6378245.0; f = 1.0/298.3; //54年北京坐标系参数
	  a=6378140.0; f=1/298.257; //80年西安坐标系参数
	  ZoneWide = 6; ////6度带宽
	  ProjNo = (int)(X/1000000L) ; //查找带号
	  longitude0 = (ProjNo-1) * ZoneWide + ZoneWide / 2;
	  longitude0 = longitude0 * iPI ; //中央经线
	  
	  
	  X0 = ProjNo*1000000L+500000L;
	  Y0 = 0;
	  xval = X-X0; yval = Y-Y0; //带内大地坐标
	  e2 = 2*f-f*f;
	  e1 = (1.0-Math.sqrt(1-e2))/(1.0+Math.sqrt(1-e2));
	  ee = e2/(1-e2);
	  M = yval;
	  u = M/(a*(1-e2/4-3*e2*e2/64-5*e2*e2*e2/256));
	  fai = u+(3*e1/2-27*e1*e1*e1/32)*Math.sin(2*u)+(21*e1*e1/16-55*e1*e1*e1*e1/32)*Math.sin(
	  4*u)
	  +(151*e1*e1*e1/96)*Math.sin(6*u)+(1097*e1*e1*e1*e1/512)*Math.sin(8*u);
	  C = ee*Math.cos(fai)*Math.cos(fai);
	  T = Math.tan(fai)*Math.tan(fai);
	  NN = a/Math.sqrt(1.0-e2*Math.sin(fai)*Math.sin(fai));
	  R = a*(1-e2)/Math.sqrt((1-e2*Math.sin(fai)*Math.sin(fai))*(1-e2*Math.sin(fai)*Math.sin(fai))*(1-e2*Math.sin
	  (fai)*Math.sin(fai)));
	  D = xval/NN;
	  //计算经度(Longitude) 纬度(Latitude)
	  longitude1 = longitude0+(D-(1+2*T+C)*D*D*D/6+(5-2*C+28*T-3*C*C+8*ee+24*T*T)*D
	  *D*D*D*D/120)/Math.cos(fai);
	  latitude1 = fai -(NN*Math.tan(fai)/R)*(D*D/2-(5+3*T+10*C-4*C*C-9*ee)*D*D*D*D/24
	  +(61+90*T+298*C+45*T*T-256*ee-3*C*C)*D*D*D*D*D*D/720);
	  //转换为度 DD
	  output[0] = longitude1 / iPI;
	  output[1] = latitude1 / iPI;
	  return output;
	  //*longitude = longitude1 / iPI;
	  //*latitude = latitude1 / iPI;
	}
	////由经纬度反算成高斯投影坐标
	public void GaussToBLToGauss(double longitude, double latitude)
	{
	 int ProjNo=0; int ZoneWide; ////带宽
	 double longitude1,latitude1, longitude0,latitude0, X0,Y0, xval,yval;
	 double a,f, e2,ee, NN, T,C,A, M, iPI;
	 iPI = 0.0174532925199433; ////3.1415926535898/180.0;
	 ZoneWide = 6; ////6度带宽
	 a=6378245.0; f=1.0/298.3; //54年北京坐标系参数
	 ////a=6378140.0; f=1/298.257; //80年西安坐标系参数
	 ProjNo = (int)(longitude / ZoneWide) ;
	 longitude0 = ProjNo * ZoneWide + ZoneWide / 2;
	 longitude0 = longitude0 * iPI ;
	 latitude0 = 0;
	 System.out.println(latitude0);
	 longitude1 = longitude * iPI ; //经度转换为弧度
	 latitude1 = latitude * iPI ; //纬度转换为弧度
	 e2=2*f-f*f;
	 ee=e2*(1.0-e2);
	 NN=a/Math.sqrt(1.0-e2*Math.sin(latitude1)*Math.sin(latitude1));
	 T=Math.tan(latitude1)*Math.tan(latitude1);
	 C=ee*Math.cos(latitude1)*Math.cos(latitude1);
	 A=(longitude1-longitude0)*Math.cos(latitude1);
	 M=a*((1-e2/4-3*e2*e2/64-5*e2*e2*e2/256)*latitude1-(3*e2/8+3*e2*e2/32+45*e2*e2
	 *e2/1024)*Math.sin(2*latitude1)
	 +(15*e2*e2/256+45*e2*e2*e2/1024)*Math.sin(4*latitude1)-(35*e2*e2*e2/3072)*Math.sin(6*latitude1));
	 xval = NN*(A+(1-T+C)*A*A*A/6+(5-18*T+T*T+72*C-58*ee)*A*A*A*A*A/120);
	 yval = M+NN*Math.tan(latitude1)*(A*A/2+(5-T+9*C+4*C*C)*A*A*A*A/24
	 +(61-58*T+T*T+600*C-330*ee)*A*A*A*A*A*A/720);
	 X0 = 1000000L*(ProjNo+1)+500000L;
	 Y0 = 0;
	 xval = xval+X0; yval = yval+Y0;
	 //*X = xval;
	 //*Y = yval;
	 System.out.println("x："+xval);
	 System.out.println("y："+yval);
	}
}
